Electric alarm-clock.



No. 703,854. Patented my I, I902.

w. E. THROOP & w. s. INGRAHAM.

ELECTRIC ALARM CLOCK.

(Application filed Feb. 25, 1902.)

(No Model.)

lzwenions: William ETlvraop 6 y W m Witnesses.-

UNITED STATES PATENT OFFICE.

WILLIAM E. THRO OP AND IVILLIAM S. INGRAHAM, OE BRISTOL, CONNECTICUT,ASSIGNORS TO THE E. INGRAI'IAM COMPANY, OF BRISTOL, CONNECTICUT, ACORPORATION OF CONNECTICUT.

ELEoTRIc ALARwnoLooK.

SPECIFICATION forming part of Letters Patent No. 703,854, dated July 1,1902.

Application filed February 25,1902. Serial No. 95,582. (No model.)

To all whom, it may concern:

Be it known that we, WVILLIAM E. THROOP and WILLIAM S. INGRAHAM,citizens of the United States of America, residing at Bristol,

in the county of Hartford and State of Connecticut, have inventedcertain new and useful Improvements in Electric Alar1n-Clocks, of whichthe following is a specification.

Our invention relates to electric alarm- 1o clocks; and it has for itsobject the provision of a device of this character which will be simplein construction and reliable in operation.

A further object of the invention is the provision of a clockprovidedwith a device com- I 5 posed of insulating material which willhold the signal out of actionuntil the time has arrived for which it isset tobe effective.

A further objectof theinvention is the provision, in a clock, of a diskcomposed of insulating material, said disk being so constructed that'anelectric connection for effecting the signal will be established at theproper time.

Other objects of the invention will be set forth in the followingdescription.

In the accompanying drawings, Figure 1 is a front elevation, partiallybroken away, of a clock in which our invention is embodied. Fig. 2 is asection showing a post or arbor and adjacent parts to which ourinvention is applied. Fig. 3 is a perspective view of a resilient armemployed in connection with ourinvention.

Like numerals designate similar parts 5 throughout the several views.

Referring to the drawings, the numeral 5 designates a clock-casing,which may be of any desired form, and in this casing is mounted a clock6, which, with the exception of the details of our invention appliedthereto, may

be of any ordinary construction.

Designated by the numeral 7 is an ordinary setting-dial, carried by anarbor 8, as is common in alarm-clocks, and to thehub 7 of this dial issecured a disk 9, composed of insulating material, said disk having anotch 9 extending to its axis and leading to and exposing the metal ofthe hub 7 to which it is sooured, as shown in Figs. 1 and 2.

Resting upon the disk 9 is a rider 10 of a preferably resilient metallicarm 10, which is secured to the clock-casing 5 by a bolt 11, passingthrough an eyelO of said arm, and in contact with a post 26 isa wire 12,leading to an electric battery 13, shown as located in the bottom of theclock-casing, although it may be differently disposed, if desired. Thiswire is clamped to one of the poles of the battery by a screw 14-, andleading from the other pole of the battery, to which it is clamped by ascrew 15, is a wire 16, connected by the usual clamping-post andconnections to magnets 17, carried in a frame 18, secured in theexempliiication given to the lower part of the back of the clock-casingby a screw 19. Leading from another post 20, connected with the magnets17, is a wire 21, shown as attached to one of the metallic side frames22 of the clock 6, although any other suitable part of said frame may beutilized for this purpose without departure from the invention.

Designated by the numeral 23 is a bell, shown secured to an arm 18,projecting from frame 18, andalso carried by this frame is the usualclapper or hammer 24 for sounding an alarm when the magnets 17 areenergized, as will be hereinafter described.

A switch 25 is pivoted to the clock-casing, and said switch serves tounite the post 26, with which wire 12 is connected, with the bolt 11 ofresilient arm 10 when the switch is turned to the position shown indotted lines in Fig. 2.

To cause the alarm to operate, switch 25 is first turned on, and thedial7 is then set in the usual manner to indicate the time it is desired tosound said alarm, so that when the recess 9 of disk 9 arrives at acertain point the rider 10 of resilient arm 10 will snap into said notchand bear against the metallic hub 7 of the dial, thereby establishing anelectric connectionthrough the clockframe between the battery and themagnets until said connection is broken by the rotation of the disk andthe consequent elevation of the arm 10.

If the switch 25 is turnec off, thereby breaking the circuit, the clockwill operate in the usual manner without sounding the alarm.

Our invention is not limited to the precise arrangement and location ofthe various parts shown, for they may be differently disposed, nor is itlimited to any specific battery or method of connecting said batterywith the various cooperating parts, nor to a specific kind of signal,for other signals may be substituted for the bell, if desired.

Having thus described our invention, what we claim is- 1. In analarm-clock, the combination,with a clock-casing, of a resilient armprojecting laterally from the interior of said clock-casing andcarryinga rider at its free end; clock mechanism; a setting-dial; acam-disk of insulating material carried by the arbor of the setting-dialand with which the rider of said resilient arm is in engagement; anelectric battery; a bolt connecting said arm to the clock-casing; a pairof electromagnets; an electric circuit, of which the clock-frameconstitutes a part, controlling said magnets; and a switch connected tosaid bolt for establishing the circuit through the clock-frame when therider of the resilient arm enters the notch of the cam-disk and engagesthe arbor of the clock.

2. In an alarm-clock, the combination, with clock mechanism, of arecessed cam composed of insulating material carried by an arbor of saidclock mechanism; a resilient, metallic arm having a rider in engagementwith the cam and adapted to engage said arbor when it enters the recessof the cam; a clock-casing; a bolt for securing the resilient, metallicarm to said clock-casing; a switch in engage ment with said bolt; acontact device secured to the clock-casing, and with which said switchis adapted to engage; a wire leading from said contact device to thebattery; a battery; an electromagnetic device; a wire connecting saidelectromagnetic device and battery; an alarm controlled by theelectromagnetic device; and a wire connecting the electromagnetic devicewith the clock-frame.

In testimony whereof we affix our signatures in presence of twowitnesses;

l/V. E. THROOP. WM. S. INGRAHAM.

Witnesses i ALFRED Ron, JAMEs GAY.

